Cheat codes:

Passcode Unlocks:
In the Passcode section of the game enter the following codes to unlock the noted units:

746C-3BBA-E396-9AFD AH-1S Cobra (D7)
3D9A-D404-70E9-0162 AH-1S Cobra(WT)
81FE-5327-CAD7-6500 AH-1W Super Cobra
C554-D619-C0C7-33A9 Cyber Ninja
F4A3-6507-A7E5-E9CD Type 60 SPRR(WT)
0993-4841-852E-14F9 Type 61 MBT(WT)
5285-2318-09F4-1DDC Type 74 MBT(D7)
6289-0549-0DF1-A797 Type 74 MBT(WT)
8399-71B4-500A-500A Type 87 SPAAG(WT)
B50A-6C45-CB7B-F94E Type 90 MBT(D7)
A124-2DC3-D9A6-D4F9 Type 90 MBT(WT)